JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Xueqiao Xie,Juan Han,Yun Wang,Yongsheng Yan,Guowu Yin,Weisheng Guan
Experimental liquid−liquid equilibrium (LLE) binodal curves, tie-lines, and plait points were obtained for the PPG400 + salt (K3PO4, K2CO3, and K2HPO4) + H2O systems at T = 298.15 K. The Merchuk equation was used to correlate the binodal data of the investigated systems. Also, the effect of salt on the phase-forming ability has been studied based on the effective excluded volume (EEV) values from fitting the binodal data to the binodal model developed by Guan, and the salting-out abilities of the anions are in the order of PO43− > HPO42− > CO32−, which may be related to the Gibbs free energy of hydration of the ions (ΔhydG). Furthermore, tie-line compositions were correlated using the Setschenow-type, Othmer−Tobias, and Bancroft equations, and the parameters are reported.
研究领域:
化学
·
生物学
✓ 已验证
DOI
高影响因子
THERMOCHIMICA ACTA
·
2011
·
IF 1.908
Xiaohong Zhao,Xueqiao Xie,Yongsheng Yan
Binodal data of poly(propylene glycol) PPG 400 + salt ((NH 4 ) 2 SO 4 , MgSO 4 , and KCl) + H 2 O systems were determined at T = 298.15 K, and binodal data of PPG 400 + KAc + H 2 O system was determined at T = (298.15, 308.15, and 318.15) K. Moreover, the binodal curves were fitted to Merchuk equation, and the tie-lines were fitted to both the Othmer–Tobias and Bancroft equations. The effects of temperature and salts on the binodals and tie-lines of the investigated ATPSs were also studied. Finally, the salting-out ability of salts on the polymer was obtained by fitting the Setschenow-type equation to the tie-line data to derive a salting-out coefficient ( k S ) for each salt. For potassium salts, the relative effectiveness of the anions in inducing the phase segregation in ATPSs follows the Hofmeister series. The relative salting-out effectiveness of the sulfate salts is influenced by complexation of the cations by PPG.
研究领域:
化学工程
·
生物技术
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2012
·Vol. 67
·期 4
·423-428
·
IF 1.096
Zhu Guo-Quan,Wang Fa-Gang,Liu Yu-Ying,Gao Qiao-Chun
A series of water-soluble carboxymethyl chitosan (CMCS)/poly(propylene glycol) (PPG) blend films with various CMCS/PPG mole ratios were prepared by the solution casting method. Morphology of the CMCS/PPG blend films was investigated by scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of the CMCS/PPG blend films were studied by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), tensile tests, and contact angle tests. It was found that the introduction of PPG can markedly affect the morphology and the properties of CMCS films.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
IEEE ELECTRON DEVICE LETTERS
·
2024
·Vol. 45
·期 6
·1036-1039
·
IF 4.1
Jiayang Liu,Yuangan Chen,Pengju Tan,Tianyu Liu,Mingzhu Hu,Mulin Sun,Long Cheng,Xiaolan Ma,Yunlong Zhang,Qin Hu
Cs3Bi2I9 single crystals has attracted increasing attention in perovskite X-ray detectors due to its low cost, nontoxicity, high stability and low detection limit. With the gradual improvement of device performance, the growth of high-quality, low-defect single crystals becomes increasingly crucial. In this work, we developed a polypropylene glycol nucleation control strategy for the effective growth of Cs3Bi2I9 single crystals with fewer defects. The X-ray detectors prepared by this strategy exhibit excellent detection and imaging performance, reaching a sensitivity of
$173.9~\mu $
C
$\cdot $
Gy
$_{\text {air}}^{-{1}}\cdot $
cm
$^{-{2}}$
at 40 V
$\cdot $
mm
$^{-{1}}$
and a detection limit of
$1.57~\mu $
Gy
$_{\text {air}}\cdot $
s
$^{-{1}}$
, and showcasing sharp imaging ability. This research contributes to the advancement of next-generation X-ray detection.
研究领域:
材料科学
·
辐射探测技术
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2020
·
IF 2.678
B. Wang,Z.Y. Li,J.N. Xu,F.Y. Liu,Y.D. Liu
Repetitive use and effective recycling of the materials are vital to overcome the current environmental challenges. In case of polymeric materials, the high curing temperatures significantly limit their application. In this study, a series of polymers with thermal reversibility at room temperature were synthesized. The main chain of the polymer systems was composed of polyethylene glycol diglycidyl ether (PEGDGE) and polypropylene glycol diglycidyl ether (PPGDGE). The polymers were obtained by initial chain-extension of furfurylamine (FA) and subsequent Diels-Alder (DA) reaction with bismaleimide (BMI). Fourier transform infrared spectroscopy analysis revealed that the material exhibited fast curing rate and high conversion rate, with the conversion rate reaching 98 %. DSC and DMA characterization demonstrated that the reverse reaction occurred at about 100℃. The tensile analysis confirmed that the mechanical properties of the developed materials remain largely unchanged after recycling, as compared with the existing materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Lifang Xu,Zhiqing Zhang,Fang Wang,Dongdong Xie,Shan Yang,Tao Wang,Lijuan Feng,Chengchai Chu
Amphiphilic triblock copolymers of PEO–PPO–PCL with various block compositions have been synthesized by ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by the OH group of methoxy–poly(ethylene oxide)–poly(propylene oxide) (Me–PEO–PPO). Their structures were confirmed by Fourier transform infrared (FT-IR) measurements, and their self-assembly in aqueous solution was studied using fluorescence spectroscopy, transmission electron microscopy (TEM), UV–vis spectra, differential scanning calorimetry (DSC), and surface tension. For the copolymers studied in this paper, the critical aggregation concentrations (CAC) ranged from 5 × 10 3 to 2 mg/L. The critical micelle concentrations (CMC) decreased with increasing PCL block length, and the downtrend was more significant in the short PCL block length. All of the three copolymers were capable of solubilizing hydrophobic molecules (pyrene) in aqueous solution and copolymers with a longer PCL block exhibited a stronger solubilizing ability. The TEM images showed that the size and morphology of the aggregations could be tuned by varying the compositions or the concentration.
研究领域:
高分子化学
·
材料科学
·
胶体与界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2018
·
IF 1.551
Tengyang Zhu,Xing Yang,Yayun Zheng,Xiaoqi He,Feifei Chen,Jujie Luo
A series of poly(amide- co -poly(propylene glycol)) (PA-PPG) random copolymers with different content of PPG were designed by polycondensation reaction. These random copolymers were blended up to 60% with commercially available Pebax 2533. The blend membranes were characterized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM). Gas permeation properties of these blend membranes were investigated using five single-gases (CO 2 , H 2 , O 2 , CH 4 , and N 2 ) at different temperature of 25–55°C and 1.0 atm. The impacts of content of PA-PPG with different PPG content and operating temperature on CO 2 separation properties of Pebax/PA-PPG blend membranes were studied. The results showed that CO 2 permeability gradually increased with the increasing operating temperature, whereas CO 2 permeability gradually decreased with the increase in content of PA-PPG. CO 2 /N 2 selectivity gradually increased with the increase in content of PA-PPG. In particular, Pebax/PA-PPG (50)–60% displayed excellent CO 2 and O 2 separation properties ( P CO2 = 79.7 Barrer and P O2 = 13.6 Barrer, CO 2 /N 2 = 34.7 and O 2 /N 2 = 5.9) at 25°C and 1.0 atm. POLYM. ENG. SCI., 59:E14–E23, 2019. © 2018 Society of Plastics Engineers
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
AIP Advances
·
2023
·Vol. 13
·期 10
·
IF 1.6
Li Yinhe,Guo Zhiqiang,Ma Shunfa,Tian Rumeng,Liu Xingjiang,Wei Liuhe
A new hydroxy-silane coupling agent was synthesized from 3-butene-1-alcohol and mercaptopropyl-3-methoxysilane based on a click reaction between double bonds and sulfhydryl groups and was successfully used in the synthesis of silane-modified polyether (STPE). The effect of molecular weight of polypropylene glycol (PPG) on the properties of silane-modified polyether was studied. It was found that with the increase in PPG molecular weight, the initial thermal decomposition temperature and hardness of STPE elastomers decreased, but the molecular structure hardly changed. In addition, with the increase in molecular weight, the elongation at break of the elastomer will gradually increase, but the tensile strength of the elastomer does not change much. When the molecular weight reaches 20 000 g/mol, the resin with a viscosity of 1.6 × 10 5 mPa s can be obtained, and the elongation at break of the cured elastomer reaches 383.4% and the tensile strength is 0.25 MPa. After the STPE resin was prepared into a silane modified sealant, the tensile strength reached 1.31 MPa and the elongation at break reached 406.2%, which had the best mechanical properties among the prepared sealants. This shows that the sealant prepared from high molecular weight resin has stronger mechanical properties, which provides a new idea for the preparation of sealants.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 32
·
IF 1.768
Xia Gao,Keping Chen,Shuen Liang,Chunchun Fan,Yigang Huang,Xiaorong Jia,Chunrong Tian,Jianhua Wang
Poly(propylene oxide) (PPO)-grafted nanosilica (NS)/polyurethane foam (PUF) composites were synthesized by a ring-opening polymerization catalytic process and reaction-molding technology. The raw NS and PPO–NS were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. Scanning electron microscopy, dynamic mechanical analysis, and compressive strength tests were used to compare the morphology and thermal and mechanical properties of the PPO–NS/PUF and raw NS/PUF composites with a series of filler contents. The PPO–NS/PUF composites generally exhibited better morphology, thermal and mechanical properties than raw NS/PUF composites. Moreover, the PPO–NS/PUF composites with lower contents (0.5, 1 php) of filler showed even higher mechanical reinforcement than that with higher contents (1.5, 2 php) of filler, which was caused by the interaction between additives and PUF matrix. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42400.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 25
·10621-10627
·
IF 3.288
Xue Xiong,Meiling Qi
This work presents a novel column fabrication approach for capillary gas chromatography (CGC) through the condensation reaction of a hydroxyl-terminated polymer with a cross-linker inside a capillary column. In this work, polypropylene glycol (PPG 4000) and tris[3-(trimethoxysilyl)propyl]isocyanurate (ICS) were employed to fabricate the PPG-gel capillary column for GC analyses. Inside the column, a 3D cross-linked organogel network forms on the capillary inner surface by condensation of PPG 4000 with ICS under the given mild conditions. As a result, the PPG-gel column exhibited moderate polarity and showed distinctly advantageous resolving performance and inertness for carboxylic acids over the PPG column by the conventional static coating method. Also, it achieved high-resolution separations of the isomer mixtures of alkanes, alkylbenzenes and halobenzenes. Moreover, the PPG-gel column exhibited dramatically improved solvent stability because of its cross-linked organogel network. The organogel column displayed excellent column repeatability and reproducibility with the RSD% values in the range of 0.01–0.04% for run-to-run, 0.71–0.84% for day-to-day and 2.4–3.1% for column-to-column. The proposed organogel approach is facile and applicable to other analogous materials and has a promising future for wide applications.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 6
·065316
·
IF 1.151
Xiaoyan Gao,Yu Mao,Lingli Ni,Xiufang Zhu,Suqin Zhou,Shan Yun,Kun Hong,Jinquan Wang
In this work, in order to improve the dispersion and reinforcement of waterborne polyurethane (WPU), nano-SiO2 was modified with a amphiphilic polymeric surfactant poly(propylene glycol) phosphate (PPG Phosphate) and oleic acid for comparison, then incorporated into WPU through in situ polymerization. The results show that both of the PPG phosphate and oleic acid were successfully grafted onto nano-SiO2 surface and significantly improved its hydrophobic property. Scanning electron microscopy (SEM) observation reveals that PPG phosphate modified SiO2 nanoparticles had good compatibility with WPU and uniformly dispersed into WPU matrix. The results also show that the tensile strength, water resistance and thermal stability were all significantly improved by incorporation of nano-SiO2, especially PPG phosphate modified SiO2, which was attributed to its good dispersion in WPU and strong interface adhesion.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Xueqiao Xie,Yongsheng Yan,Juan Han,Yun Wang,Guowu Yin,Weisheng Guan
Liquid−liquid equilibrium data for the PPG400 (poly(propylene glycol)) + salt (potassium citrate, potassium tartarate, potassium oxalate) + water systems have been determined experimentally at T = (298.15, 308.15, and 318.15) K. The effects of temperature on the binodal curves and tie-lines were studied, and it was observed that an increase of the temperature generally led to an increase of the biphasic area. Furthermore, the binodal curves were fitted to a five-parameter equation relating the concentrations of PPG400 and salt. The effective excluded volume (EEV) values obtained from the binodal model were determined, and the salting-out ability of the anions follows the ordering citrate3− > tartarate2− ≈ oxalate2−. Finally, the Setschenow-type and Othmer−Tobias and Bancroft equations have been successfully used to correlate the tie-line compositions.
研究领域:
化学工程
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）